Bearing.



N. L. OBRECHT.

BEARING.

` APPLoATIoN FILED APR.1o, 191s,

` 191 179226, Patented Nov.17,1914.

Tg1. *Egal Flg fra estaras recrear Ionirica.

NORBERT L. GERECHT, OF`DETYROIT, MICHIGAN, ASSIGNOR, BY DIR-ECT AND MESNE l ASSIGNMENTS, T0 0.,.ND ,5. BEARING COJIAJTY,V 0F DETROIT, MICHIGAN, .A PART- NERSHIP COMPOSED SKILLMAN.

T0 allzu/710m it may concern:

Be it lmoivn that l, NORBERT L. Oeiinoiar,

a citizen of the United States-ofAmerica,

residing at Detroit, in the county of Wayne and State of Michigan, have invented certainneW and useful Improvements in Bearings, of which the following is a specificartion, reference being had therein to the ac-f companying drawings. I l

My invention relates to bearings, and resides in the novel construction of the bearing and the method of makingthe same; 4in

the novel lulinicating fabric from which' the bushing or bearing is made; and further in theV method of fabric. f

tudinal. central section illustrating one form of my improved bearing; Fig; 2 is an end the bearing; .and Fig. 8 is a perspective view.V

of one of the bearing parts. y y

A designates a bearing embodying the invention. formed of sections B and C, positioned the one Within the other for relative movement, and a lubricating bushing Darf' ranged intermediate and compressed bey tvfeen the relatively movable sections. ln

y forming .the bearing theA section `C is made of across-section sufficiently less than that of the section l, to permit the inner to be readily arranged Within the outer, With the lubricating material therebetween. The difference in cross-section of the tWo sections is then decreased so as to properly compress the lubricating material therebetween. @ne

of the sections-preferably the inner-has the face in engagement With the outer,

smooth or polished, so as to permit this sec-k' tion to freely turn in relation to the bushing. Preferably this lubricating material comprises a fibrous substance treated with a solid lubricant such as graphite-in contradistinction to a plastie'or liquid lubricant In treating'the fabric I find it desirable to impregnate it With the solid lubricant by forming a mixture of finely powdered solid lubricant and a carrying agentwhich will carry the lubricant/thoroughly into the fibrous substance; substantially, if not all of the carrying agent being afterward driven v Speccation'of Letters Patent.

I. out of the fabric as 4by lcompressing the lat- -ter.`

forming the lubricating OF HARRY SKILLMN, NORBESRT L. GERECHT, AND NEWTON BEAR-ine.

Patented Nov. f7, Mild.

Appiic'ation filed april 10,1913. sei-iai N9.' 760,256.

Asbestos fabric having `interwoven therein a sufficient quantity, of fine Wire to bet-'ter maintain the shape of the fabric, has p rovena Very efficient fibrous material for such purposes. The asbestos is impregnated ivith graphite by placing the same in a mixtureA of oil,- tallotv and finely,@powdered `gr'aphite,' having about the proportions of i twobf graphite, one of oil and one of tal` loW, the mixturef being maintained `at a temperature'of about 300 degrees F. so Ias to increase the liquidity of the oil'and tallow, .to permit the same Yito carry the graphite thoroughly betweenv the bers of the asbestos. The length of timel Which theI asbestosremains'y in the mixture depends of course,

upon the thicknessxof the fibrous substance employed.

' The specic type of bearing illustrated is designed for use with shackles of vehicle springs 'and is composed of metallic, cylindrical sleeves ooncentrically arranged for relative, voscillatory .movement, the lubricatrin'g[fabric being interposed between lthe sleeves. The outer sleeve, Whichais preferably of steel, has avdriving fit With the eye E 'ofthe spring E, While the inner, concentric member is preferably of soft steel, brass, or -the}1ike, and isl ixedly secured against rotationto thebolt l?, Which connects the bearing'and'the shackle When Vthe parts are assembled the lubricatingfabric forms a pushing* Within which the brass sleeve oscilates. 1

As bei-forte'statedlre method of making my toy improved bearing is also novel, and in orvder vthat, this method may be better understood, the specific process used in constructing vthe`:-.`e m2bodin'ient,of the invention shown in 'the drawing, Will be described. rlhe inner section is. formed from' a sleeve O- seexFig..-bfj-`of a. length slightly greater thanatheleiigth ofthe outer sleeve. and provided Iwith integra-l, annular 7anges v at opposite -fendsfyvhile the outer sleeve is of a sizetojpermit the flange ends of the inner member ftoQbe,y inserted therethrough. The bushing 'is made from a strip F of reinforcedasbestos ofl the :desired Width, treated Witha mixture of graphite, oil and tallow, as hereinbefore Vdescribed, .and cut into a length'equal'to the circumference of the inner'sleevebefore it is expanded. One end of the strip as itl is tapered and the other end provided with a coperating recess' l so as to provide a better joint between the meeting ends of the fabric. "llhe strip is then wrapped around the inner sleeve land sufficiently compressedv thereabout so that it will remain in engagement therewith during the telescoping. of y,the sleeves. After the parts are so assembled'they are `placed in a suitable machine aindthe inner sleeve expanded by driving a tapering mandrel ll therethrough, as shown/in Fig. 6. During the expanding'of the inner sleeve the v{ibi-ous material is compressed so that it is exceedinglyhard, a pressure of about 10000 pounds being applied 4to the mandrel to force the saine through the sleeve C, and

during this compression the carrying agent is substantially, if not entirely, driven out of the fabric through the opening at the.

ends of the sleeves. rlfhe expansion of the brass sleeve contactsI the same longitudinally and when the bearing is finished, the sleeves are of the same length, while the an` nular flanges are inl exceedinglyclose pronimity to, but slightly out of engagement, with the' inner face of the outer sleeve. These flanges form retainers for the busliing and alsov prevent dirt or` the like from l"working its way in between the vseveral parts. Since the inner face of the outer sleeve is unfinished, the fibrous material will adhere thereto sufficient toprevent rotation between `the bushing and the outer sleeve.

3 5 rlhe brass sleeve, however, has the outer face thereof polished so that it will readily turn Lin the bushing. wWith the bushing heretofore described the compressed fabric tends to expand even after being highly 40 compressed and, therefore, veXerts an eX- pansible pressure upon the inner andy/ outer sections. j

vThe method just described, while desir-l able, is of bourse, subject to various modil5` fications without departing from the scope4 Aof my invention.

l/'Vhat ll claim as my invention is: 1. 'llhe combination with relatively mov-v 'able .inner and outer members, of anA annular bushing composed of anl expansible fibrous substance impregnated with a' lubricant arranged intermediate tlierelatively movable members, and radially compressed therebetween, whereby said bushing acts expansively against both members with substanbers, of'a bushing comprising a reinforced expansible fabric impregnated with a lubricant arranged intermediate said members and radially compressed therebetween, whereby said bushing actseXpan sively against both. members with substantially equal radial pressure throughout its f length.

3. A bearing comprising relatively movable, concentrically arranged, metallic,

sleeves, and a bushing composed ofl a fabric impregnated with a solid lubricant arranged intermediate said sleeves and compressedtherebetween so as to act expansively against both members. i

t'. As' newarticle of manufacture, a bearing comprising inner and outer sleeves, a compressed, eXpansible, lubricating material therebetween and connecting the two sleeves together while permitting a relative, rotary movement between the two.

5. A bearing comprising inner and outer relatively movable members, the inner member being hollow, and a bushing of compressed, `expansible, lubricating material interposed between the inner and outer members and exerting an eXpa-nsible pressure upon said members.

6. it bearingcomprising inner` and outer relatively movable members, the inner membei' being hollow, and a bushing of brous substance impregnated with a solid lubrimant interposed between the inner and.

outer members and exerting an eXpansible pressure upon said members.

7. A bearing comprising inner and outer relatively movable members, the inner mein-4 ber being hollow, a bushing of fibrous'substance impregnated with a solid lubricant `interposed between the inner 'and outer members and exerting an expansible pressure upon said members, and a flange 'at each end ofthe bearingiprojecting from one of said members forming a retainer for lthe bushing.

8. A bearing comprising relatively-mov able, concentrically arranged metallic sleeves, and a bushing composed of a fabric impregnated with a solid lubricant arranged intermediate said sleeves and comf` pressed therebetween, .said bushing exert ing an expansible pressure upon said sleeves. i

ln testimony whereof llaiiiX my signature ion 

